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Condensed Matter Seminar feat. Bella Lake "First exploration of novel Bethe string states in the model magnetic material SrCo2V2O8"
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Thursday, January 14, 2021 - 11:30am to 12:30pm
Bella Lake (Helmholtz Zentrum and TU Berlin)
Complex bound states of magnetic excitations, known as Bethe strings, were predicted almost a century ago to exist in one-dimensional quantum magnets. The string states have so far remained the subject of intense theoretical studies but without experimental verification. Here, by performing neutron scattering experiments on the one-dimensional Heisenberg-Ising antiferromagnet SrCo2V2O8 in high longitudinal magnetic fields, we reveal and explore the string states and find excellent agreement with Bethe-ansatz calculations.